CN103996963A - Q-switched laser with shared output mirror and double resonant cavities - Google Patents
Q-switched laser with shared output mirror and double resonant cavities Download PDFInfo
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- CN103996963A CN103996963A CN201410252857.2A CN201410252857A CN103996963A CN 103996963 A CN103996963 A CN 103996963A CN 201410252857 A CN201410252857 A CN 201410252857A CN 103996963 A CN103996963 A CN 103996963A
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Abstract
The invention relates to a Q-switched laser with a shared output mirror and double resonant cavities. Different spatial light splitting ways are used for generating two ways of lasers, and then one output mirror is shared to achieve beam combined output. Two kinds of light splitting ways exist, according to one kind of light splitting way, light splitting is achieved on one light path, and a light beam passes through a second total-reflectivity mirror with a small hole in the center and then is split. One part of low-order modes pass through the small hole and then pass through a Q-switched device, and the other part of high-order modes are reflected to gain media on the periphery of the small hole to be output in a vibrating mode. According to the other kind of light splitting way, light splitting is achieved on two light paths, a light splitting path is provided with the second total-reflectivity mirror, two light beams are generated through a light splitting device, one light beam provides average power, the other light beam generates high-peak power, and then the average power and the high-peak power are output by the shared output mirror. According to the Q-switched laser with the shared output mirror and the double resonant cavities, high-peak power output and high average power output can be achieved at the same time, light beams with high pulse capacity and high-peak power can be acquired at the same time, the generated light beams are distributed to be in a waveform with overlaid pulse peaks on a step in spatial distribution, the step reflects the average power, and the pulse peak reflects the peak power.
Description
Technical field
The invention belongs to laser technique field, particularly a kind of outgoing mirror dual resonant cavity Q-switched laser altogether.
Background technology
On same laser, both can obtain the output of long pulse high-energy simultaneously, can obtain again high-peak power output, this kind of laser can greatly enrich the application of laser, and can laser pulse parameters be set neatly according to practical application, improve quality and the efficiency of laser processing.At present, also do not have both at home and abroad a kind of technology high pulse energy and high peak power can be combined.Obtaining in the prior art the traditional solution of high pulse energy is the pulse pump technology that adopts macro-energy, can obtain large pulsed laser energy, but peak power is often lower.Obtain high-peak power laser pulse, conventionally adopt Q-regulating technique, but pulse energy is often restricted again.
Summary of the invention
The present invention has overcome the defect of above-mentioned existence, object is to have solved laser to utilize spatial beam beam splitting, light beam obtains large pulse energy, another light beam obtains high peak power by Q-switching device, two-beam is in two laserresonators, the bundle that closes of realizing two-beam by the same laser output mirror sharing can obtain high pulse energy and high peak power simultaneously, and a kind of outgoing mirror dual resonant cavity Q-switched laser is altogether provided.
The present invention is outgoing mirror dual resonant cavity Q-switched laser content Description altogether:
The present invention is outgoing mirror dual resonant cavity Q-switched laser altogether, it is characterized in that: adopt light splitting mode in space to produce two-way laser, a public outgoing mirror is realized and closed bundle output; There are two kinds of light splitting modes: the first is single channel light splitting, it is that the total reflective mirror of 0.5mm～5mm circular hole carries out light splitting that employing center is provided with diameter, in light path, be followed successively by the second total reflective mirror, gain medium and the outgoing mirror of the first total reflective mirror, Q-switching device, center band circular hole, in a light path, realize light splitting, light beam by the second total reflective mirror with center hole after light splitting, part low-order mode by after centre bore through Q-switching device, the output of vibrating in the periphery of centre bore is reflected back gain media of another part high-rder mode; The second is two-way light splitting, by center, be provided with 45 degree speculum or the light splitting of Brewster spectroscope that effective clear aperature is 0.5mm～5mm circular hole, on main optical path, be followed successively by 45 degree speculum or Brewster spectroscope, gain medium and outgoing mirrors of the first total reflective mirror, Q-switching device, center band circular hole, path-splitting is provided with the second total reflective mirror, utilize light-splitting device to produce two-way light beam, one tunnel provides high-average power, and another road is total to outgoing mirror output after producing high-peak power.
On laser light path, be followed successively by total reflective mirror I, Q-switching device, total reflective mirror II, gain medium and outgoing mirror, at total reflective mirror Ⅱ center, being provided with diameter is 0.5mm～5mm circular hole; Outgoing mirror dual resonant cavity Q-switched laser is a light path altogether, be provided with two resonant cavitys, the first resonant cavity being formed by: total reflective mirror I, Q-switching device, gain medium and outgoing mirror, and by: the second resonant cavity that total reflective mirror II, gain medium and outgoing mirror form.
Employing center is established round-meshed 45 degree speculums and is realized minute light generation mirror output altogether, be provided with two resonant cavitys, the first resonant cavity provides high-peak power output, successively by: 45 degree total reflective mirror II, gain medium and the outgoing mirror of total reflective mirror I, Q-switching device, center band circular hole form; The second resonant cavity provides high-average power output, establishes round-meshed 45 degree speculums, gain medium and outgoing mirror be successively comprised of total reflective mirror III, center.
Employing center is established round-meshed 45 degree speculums and is realized minute light generation mirror output altogether, be provided with two resonant cavitys, the first resonant cavity provides high-average power output, successively by: 45 degree total reflective mirror II, gain medium and the outgoing mirror of total reflective mirror I, center band circular hole form; The second resonant cavity provides high-peak power output, establishes round-meshed 45 degree speculums, gain medium and outgoing mirror be successively comprised of total reflective mirror III, Q-switching device, center.
Be provided with two resonant cavitys, adopt Brewster spectroscope to realize minute light generation mirror output altogether, the first resonant cavity provides high-peak power output, successively by: total reflective mirror I, Q-switching device, Brewster spectroscope, gain medium and outgoing mirror form; The second resonant cavity provides high-average power output, consists of successively total reflective mirror III, Brewster spectroscope, gain medium and outgoing mirror.
Adopt Brewster spectroscope to realize minute light generation mirror output altogether, be provided with two resonant cavitys, the first resonant cavity provides high-average power output, successively by: total reflective mirror I, Brewster spectroscope, gain medium and outgoing mirror form; The second resonant cavity provides high-peak power output, consists of successively total reflective mirror III, Q-switching device, Brewster spectroscope, gain medium and outgoing mirror.
The present invention utilizes various ways light splitting to export at common mirror, can realize high-peak power and high-average power output simultaneously, can obtain the light beam of high pulse energy and high peak power simultaneously, the light beam producing is the waveform that on a step, stack has pulse spike in spatial distribution, step reflection average power, pulse spike reflection peak power.
Accompanying drawing explanation
Fig. 1 is the structural representation of common outgoing mirror dual resonant cavity Q-switched laser embodiment 1;
Fig. 2 is the structural representation of common outgoing mirror dual resonant cavity Q-switched laser embodiment 2;
Fig. 3 is the structural representation of common outgoing mirror dual resonant cavity Q-switched laser embodiment 3;
Fig. 4 is the structural representation of common outgoing mirror dual resonant cavity Q-switched laser embodiment 4;
Fig. 5 is the structural representation of common outgoing mirror dual resonant cavity Q-switched laser embodiment 5;
In figure: the 1st, total reflective mirror I, the 2nd, Q-switching device, the 3rd, total reflective mirror II, the 4th, gain medium, the 5th, outgoing mirror, the 6th, total reflective mirror III, the 7th, round-meshed 45 degree speculums, the 8th, Brewster spectroscope are established in center.
Embodiment
The present invention is outgoing mirror dual resonant cavity Q-switched laser altogether, adopts different space light splitting modes to produce two-way laser, then bundle output is closed in public outgoing mirror realization; Adopt light splitting mode in space to produce two-way laser, a public outgoing mirror is realized and is closed bundle output; There are two kinds of light splitting modes: the first is single channel light splitting, utilize center to be provided with the total reflective mirror that diameter is 0.5mm～5mm circular hole and carry out light splitting, in light path, be followed successively by the second total reflective mirror, gain medium and the outgoing mirror of the first total reflective mirror, Q-switching device, center band circular hole, in a light path, realize light splitting, light beam by the second total reflective mirror with center hole after light splitting, part low-order mode by after centre bore through Q-switching device, the output of vibrating in the periphery of centre bore is reflected back gain media of another part high-rder mode; The second is two-way light splitting, by center, be provided with 45 degree speculum or the light splitting of Brewster spectroscope that effective clear aperature is 0.5mm～5mm circular hole, on main optical path, be followed successively by 45 degree speculum or Brewster spectroscope, gain medium and outgoing mirrors of the first total reflective mirror, Q-switching device, center band circular hole, path-splitting is provided with the second total reflective mirror, utilize light-splitting device to produce two-way light beam, one tunnel provides high-average power, another road is total to outgoing mirror output after producing high-peak power, below in conjunction with embodiment and accompanying drawing, illustrates.
Embodiment 1
See Fig. 1, the present invention is outgoing mirror dual resonant cavity Q-switched laser altogether, is followed successively by total reflective mirror I 1, Q-switching device 2, total reflective mirror II 3, gain medium 4 and outgoing mirror 5 on laser light path, and at the center of total reflective mirror II 3, being provided with diameter is 0.5mm～5mm circular hole.
Outgoing mirror dual resonant cavity Q-switched laser is seemingly a light path altogether, be provided with two resonant cavitys, the first resonant cavity being formed by: total reflective mirror I 1, Q-switching device 2, gain medium 4 and outgoing mirror 5, and by: the second resonant cavity that total reflective mirror II 3, gain medium 4 and outgoing mirror 5 form.
Operation principle is:
Light beam is in the first resonant cavity, circular hole by the light beam through laser medium 4 concussions through total reflective mirror II 3 centers, a part of low-order mode at Gaussian beam center is through the center hole of total reflective mirror II 3, through Q-switching device 2, adjust Q, through total reflective mirror I, center hole and the gain medium 4 of Q-switching device 2, total reflective mirror II 3 are passed through in 1 reflection again again, from the laser of outgoing mirror 5 output high-peak powers.
Light beam is in the second resonant cavity, center hole by the light beam through laser medium 4 concussions through total reflective mirror II 3, its high-rder mode part enters in gain medium again at the peripheral reflection of circular hole, forms vibration and amplifies, by outgoing mirror 5 output high-average powers.
Embodiment 2
See Fig. 2, the present invention is outgoing mirror dual resonant cavity Q-switched laser altogether, and employing center is established round-meshed 45 degree speculums 7 and realized minute light generation mirror output altogether.
The present invention altogether outgoing mirror dual resonant cavity Q-switched laser is provided with two resonant cavitys, the first resonant cavity provides high-peak power output, successively by: 45 degree total reflective mirror II 3, gain medium 4 and the outgoing mirror 5 of total reflective mirror I 1, Q-switching device 2, center band circular hole form; The second resonant cavity provides high-average power output, establishes round-meshed 45 degree speculums 7, gain medium 4 and outgoing mirror 5 be successively comprised of total reflective mirror III 6, center.
Operation principle is:
The low-order mode light beam of establishing round-meshed 45 degree speculums 7 by center vibrates in the first resonant cavity, through Q-switching device 2, produce high-peak power pulse, the high-rder modes of not establishing round-meshed 45 degree speculum 7 circular by center are established at center on the minute surface of round-meshed 45 degree speculums 7 and are reflexed to total reflective mirror III 6, form the second resonant cavity, vibration output high-average power, two resonant cavitys are still total to outgoing mirror Output of laser.
Embodiment 3
See Fig. 3, the present invention is outgoing mirror dual resonant cavity Q-switched laser altogether, and employing center is established round-meshed 45 degree speculums 7 and realized minute light generation mirror output altogether.
The present invention altogether outgoing mirror dual resonant cavity Q-switched laser is provided with two resonant cavitys, and the first resonant cavity provides high-average power output, successively by: 45 degree total reflective mirror II 3, gain medium 4 and the outgoing mirror 5 of total reflective mirror I 1, center band circular hole form; The second resonant cavity provides high-peak power output, establishes round-meshed 45 degree speculums 7, gain medium 4 and outgoing mirror 5 be successively comprised of total reflective mirror III 6, Q-switching device 2, center.
Operation principle is:
Laser low-order mode is directly vibrated high-average power is provided by 45 degree speculum centers, and by aperture center, at aperture peripheral reflection, to the high-rder mode of dypass, does not adjust Q that high-peak power is provided.
Embodiment 4
See Fig. 4, the present invention altogether outgoing mirror dual resonant cavity Q-switched laser is provided with two resonant cavitys, adopts Brewster spectroscope 8 to realize minute light generation mirror output altogether.
The present invention is provided with two resonant cavitys, and the first resonant cavity provides high-peak power output, successively by: total reflective mirror I 1, Q-switching device 2, Brewster spectroscope 8, gain medium 4 and outgoing mirror 5 form; The second resonant cavity provides high-average power output, consists of successively total reflective mirror III 6, Brewster spectroscope 8, gain medium 4 and outgoing mirror 5.
Operation principle is:
Utilize Brewster light splitting piece to produce the orthogonal light beam of two-way polarization state, one route polarised light vibrates in the first resonant cavity, through Q-switching device 2 modulation, a large amount of reversion particle avalanche types of accumulation transit to low-lying level, produce high-peak power, another route polarisation being produced by Brewster light splitting piece reflexes in the second resonant cavity, through total reflective mirror 6, reflects, the second resonant cavity provides high-average power, and two resonant cavitys are jointly by outgoing mirror 5 output beams.
Embodiment 5
See Fig. 5 the present invention outgoing mirror dual resonant cavity Q-switched laser altogether, adopt Brewster spectroscope 8 to realize minute light generation mirror output altogether.
The present invention is provided with two resonant cavitys, and the first resonant cavity provides high-average power output, successively by: total reflective mirror I 1, Brewster spectroscope 8, gain medium 4 and outgoing mirror 5 form; The second resonant cavity provides high-peak power output, consists of successively total reflective mirror III 6, Q-switching device 2, Brewster spectroscope 8, gain medium 4 and outgoing mirror 5.
Operation principle is:
Utilize Brewster light splitting piece to produce the orthogonal light beam of two-way polarization state, one route polarised light vibrates and forms high-average power output in the first resonant cavity, another route polarisation being produced by Brewster light splitting piece reflexes in the second resonant cavity, through Q-switching device 2 modulation, a large amount of reversion particle avalanche types of accumulation transit to low-lying level, produce high-peak power, the second resonant cavity provides high-peak power, and two resonant cavitys are jointly by outgoing mirror 5 output beams.
In a word; the present invention is not limited to above-mentioned embodiment; persons skilled in the art are according to content disclosed by the invention; can adopt other multiple embodiment to implement the present invention; therefore; every employing project organization of the present invention and thinking, do some simple designs that change or change, and all falls into the scope of protection of the invention.
The present invention is on existing straight chamber distribution acousto-optic Q modulation laser basis, has proposed a kind of outgoing mirror dual resonant cavity Q-switched laser altogether, can obtain high pulse energy and high peak power simultaneously.Dual resonant cavity is embodied in by one containing foraminate total reflective mirror or containing foraminate 45 degree total reflective mirrors, a part of low-order mode light beam is projected in the past from aperture, through Q-switching device, produce high-peak power Laser output, high-rder mode light beam is reflected back in gain media in the periphery of total reflective mirror aperture, or through the central small hole peripheral reflection of 45 degree speculums to vibration output on the total reflective mirror in the second light path, then the laser of outgoing mirror output high-average power altogether.Also can produce the object that the vertical light beam of two-way polarization state reaches light splitting by Brewster spectroscope, Q output high-peak power is adjusted on a road, and a road free oscillation produces high-average power.
The light beam that the present invention produces is the waveform that on a step, stack has pulse spike in spatial distribution, step reaction average power, and pulse spike reaction peak power, has:
(1) utilize the aperture 45 degree total reflective mirrors that diameter is contained for 0.5mm to 5mm circular hole in center or effectively clear aperature is 0.5mm to 5mm, distribution sees through aperture and adjusts Q generation peak value and aperture peripheral reflection to return the ratio of vibration generation average power in medium, produces high-average power and high-peak power simultaneously;
(2) utilize polarized light splitting device, laser can be divided into the orthogonal two-way of polarization state, a branch road free oscillation provides average power, and another branch road is lowered Q output high-peak power in small-power situation, the outgoing mirror output altogether of two resonant cavitys;
(3) utilize the notch cuttype light-pulse generator of the high-peak power high-average power of laser generation of the present invention, in punching, in the laser processing applications such as cutting, there is higher efficiency.
Claims (6)
1. be total to an outgoing mirror dual resonant cavity Q-switched laser, it is characterized in that: adopt light splitting mode in space to produce two-way laser, a public outgoing mirror is realized and closed bundle output; There are two kinds of light splitting modes: the first is single channel light splitting, it is that the total reflective mirror of 0.5mm～5mm circular hole carries out light splitting that employing center is provided with diameter, in light path, be followed successively by the second total reflective mirror, gain medium and the outgoing mirror of the first total reflective mirror, Q-switching device, center band circular hole, in a light path, realize light splitting, light beam by the second total reflective mirror with center hole after light splitting, part low-order mode by after centre bore through Q-switching device, the output of vibrating in the periphery of centre bore is reflected back gain media of another part high-rder mode; The second is two-way light splitting, by center, be provided with 45 degree speculum or the light splitting of Brewster spectroscope that effective clear aperature is 0.5mm～5mm circular hole, on main optical path, be followed successively by 45 degree speculum or Brewster spectroscope, gain medium and outgoing mirrors of the first total reflective mirror, Q-switching device, center band circular hole, path-splitting is provided with the second total reflective mirror, utilize light-splitting device to produce two-way light beam, one tunnel provides high-average power, and another road is total to outgoing mirror output after producing high-peak power.
2. altogether outgoing mirror dual resonant cavity Q-switched laser according to claim 1, it is characterized in that: on laser light path, be followed successively by total reflective mirror I (1), Q-switching device (2), total reflective mirror II (3), gain medium (4) and outgoing mirror (5), at the center of total reflective mirror II (3), being provided with diameter is 0.5mm～5mm circular hole; Outgoing mirror dual resonant cavity Q-switched laser is a light path altogether, be provided with two resonant cavitys, the first resonant cavity being formed by: total reflective mirror I (1), Q-switching device (2), gain medium (4) and outgoing mirror (5), and by: the second resonant cavity of total reflective mirror II (3), gain medium (4) and outgoing mirror (5) formation.
3. altogether outgoing mirror dual resonant cavity Q-switched laser according to claim 1, it is characterized in that: employing center is established round-meshed 45 degree speculums (7) and realized minute light generation mirror output altogether, be provided with two resonant cavitys, the first resonant cavity provides high-peak power output, successively by: 45 degree total reflective mirror II (3), gain medium (4) and the outgoing mirror (5) of total reflective mirror I (1), Q-switching device (2), center band circular hole form; The second resonant cavity provides high-average power output, establishes round-meshed 45 degree speculums (7), gain medium (4) and outgoing mirror (5) be successively comprised of total reflective mirror III (6), center.
4. altogether outgoing mirror dual resonant cavity Q-switched laser according to claim 1, it is characterized in that: employing center is established round-meshed 45 degree speculums (7) and realized minute light generation mirror output altogether, be provided with two resonant cavitys, the first resonant cavity provides high-average power output, successively by: 45 degree total reflective mirror II (3), gain medium (4) and the outgoing mirror (5) of total reflective mirror I (1), center band circular hole form; The second resonant cavity provides high-peak power output, by total reflective mirror III (6), Q-switching device (2), center, establish round-meshed 45 degree speculum outgoing mirror dual resonant cavity Q-switched laser altogether according to claim 1 successively, it is characterized in that: 7, gain medium (4) and outgoing mirror (5) form.
5. altogether outgoing mirror dual resonant cavity Q-switched laser according to claim 1, it is characterized in that: be provided with two resonant cavitys, adopt Brewster spectroscope (8) to realize minute light generation mirror output altogether, the first resonant cavity provides high-peak power output, successively by: total reflective mirror I (1), Q-switching device (2), Brewster spectroscope (8), gain medium (4) and outgoing mirror (5) form; The second resonant cavity provides high-average power output, consists of successively total reflective mirror III (6), Brewster spectroscope (8), gain medium (4) and outgoing mirror (5).
6. altogether outgoing mirror dual resonant cavity Q-switched laser according to claim 1, it is characterized in that: adopt Brewster spectroscope (8) to realize minute light generation mirror output altogether, be provided with two resonant cavitys, the first resonant cavity provides high-average power output, successively by: total reflective mirror I (1), Brewster spectroscope (8), gain medium (4) and outgoing mirror (5) form; The second resonant cavity provides high-peak power output, consists of successively total reflective mirror III (6), Q-switching device (7), Brewster spectroscope (8), gain medium (4) and outgoing mirror (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410252857.2A CN103996963A (en) | 2014-06-10 | 2014-06-10 | Q-switched laser with shared output mirror and double resonant cavities |
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| CN201410252857.2A CN103996963A (en) | 2014-06-10 | 2014-06-10 | Q-switched laser with shared output mirror and double resonant cavities |
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Cited By (1)
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| CN109807474A (en) * | 2019-03-21 | 2019-05-28 | 广州安特激光技术有限公司 | A kind of hard brittle material laser precision machining equipment |
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Application publication date: 20140820 |